ABYSS aims to be a fully HTTP/1.1 compliant Web server. Its main design goals are speed, low resource usage, and portability. ABYSS works on most UNIX based systems and on Win32 systems (Win95/98/2000/NT/XP).

Alkaline is a full-featured standalone search and index server. The spider is a fully remote indexing daemon which includes support for all standards like robots.txt and "skip" meta tags, and allows multiple distinct configurations and search groups (searching many different sites from your server), including complex regexp indexing paths, authentification, filters for various document formats, XML-based online management and statistics, mrtg-compatible perf numbers, and more.

The Apache JServ is a Java servlet engine, an external process written in Java which runs separate from the web server and handles requests to Java servlets. mod_jserv is an Apache HTTPD module written in C which provides an interface to the Apache JServ engine.

Apache-SSL is the original secure webserver based on Apache and SSLeay/OpenSSL. It provides 128 bit encryption, client authentication and a modular API. It is actively maintained, and very widely used.

Aphid (the Apache/Perl HTTP Installation Daemon) provides a quick facility for compiling and installing the Apache Web server with support for SSL via mod_ssl, and with the embedded Perl interpreter provided by mod_perl. It downloads, compiles, and installs the software into the directory of your choice. Aphid places emphasis on providing an intuitive, browser-based interface and keeping a tiny distribution footprint. To date Aphid has been tested on Rehat Linux 6 and 6.2, FreeBSD 4.0, and Solaris 2.6 and 7.

auth_ldap is an LDAP authentication module for the Apache Web server. Auth_ldap
has excellent performance, due to its use of aggressive client-side caching
algorithms. It also has support for LDAP over SS or TLSL. It also features a
mode that lets Microsoft Frontpage clients manage their Web permissions while
still using LDAP for authentication.

BCLF is the Binary Common Log Format, a fast, platform independent, streamable, compact logging format that resembles the Extended CLF logging format in content. The project goal is to make an Apache module and enhance the format without giving up speed.

Boa is a single-tasking HTTP server. That means that unlike traditional Web servers, it does not fork for each incoming connection, nor does it fork many copies of itself to handle multiple connections. It internally multiplexes all of the ongoing HTTP connections, and forks only for CGI programs (which must be separate processes), automatic directory generation, and automatic file gunzipping. Tests show boa is capable of handling up to several hundred hits per second on a 100 Mhz Pentium, dozens of hits per second on a lowly 20 MHz 386/SX, and thousands on more powerful CPUs.